Neutrinos and collider physics

Frank F Deppisch,Apostolos Pilaftsis,P S Bhupal Dev

doi:10.1088/1367-2630/17/7/075019

Frank F Deppisch, Apostolos Pilaftsis + Show 1 more

Open Access

https://doi.org/10.1088/1367-2630/17/7/075019

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Abstract

We review the collider phenomenology of neutrino physics and the synergetic aspects at energy, intensity and cosmic frontiers to test the new physics behind the neutrino mass mechanism. In particular, we focus on seesaw models within the minimal setup as well as with extended gauge and/or Higgs sectors, and on supersymmetric neutrino mass models with seesaw mechanism and with R-parity violation. In the simplest type-I seesaw scenario with sterile neutrinos, we summarize and update the current experimental constraints on the sterile neutrino mass and its mixing with the active neutrinos. We also discuss the future experimental prospects of testing the seesaw mechanism at colliders and in related low-energy searches for rare processes, such as lepton flavor violation and neutrinoless double beta decay. The implications of the discovery of lepton number violation at the Large Hadron Collider for leptogenesis are also studied.

Highlights

Following the discovery of the Higgs at the LHC, we are close to verifying the mechanism of charged fermion mass generation
What will remain missing though is an understanding of the light neutrino masses
The observation of neutrino oscillations shows that neutrinos have finite masses and that individual lepton flavour is violated

Summary

Introduction

Following the discovery of the Higgs at the LHC, we are close to verifying the mechanism of charged fermion mass generation. The generic seesaw mechanism has major phenomenological issues: (i) In the regime mN 1011 GeV, heavy neutrinos are far too heavy to be probed experimentally; (ii) Heavy neutrinos are sterile and they only interact through a small mixing with light neutrinos. In this short proceedings report, we will briefly review two scenarios that instead include TeV scale and potentially non-singlet neutrinos and which can be probed at the LHC. We will comment on the general impact of the experimental observation of LNV on baryogenesis models

Low Scale Seesaw

Heavy Sterile Neutrinos

Left-Right Symmetric Models

Falsifying High-Scale Baryogenesis

Conclusions